Originally Posted by erics02wrx
Maybe 5% louder than before, no change inside the car. It did add a little more rumble, sounds awesome!
Really? Not noticeable in the car? Cool. My aftermarket cat back Vorsteiner set up added some volume and I am really hesitant to make it any louder. The sound quality was really improved for me but I am definitely concerned about doing something that will make long freeway trips and road trips annoying to unbearable.